一种基于椭圆曲线变换的数字音频零水印算法

A Digital Audio Zero-Watermarking Algorithm with SVD and Elliptic Curve

为了在保证音频质量的前提下实施对音频的版权保护,提出了一种新颖有效的数字音频零水印算法,采用具有扰动稳定性、旋转不变性和惟一性等特性的音频信号的奇异值来构造零水印,并首次提出对用于构造水印的奇异值进行椭圆曲线变换的方法,使得水印信号复杂多变,不易破译。此外,通过对构造出的二值图像水印与有意义的图像相异或得到有意义的水印信息,满足了音频版权认证的需要,并且能够实现数据隐藏,又没有影响水印的不可感知性。实验结果表明上述算法构造二值水印具有很强的隐蔽性,更好的满足了水印的不可见性及安全性的要求。水印对叠加噪声、剪切处理、重采样等攻击具有鲁棒性。

In order to guarantee the audio quality and protect the audio copyright, this paper proposes a new and effective digital audio zero - watermarking algorithm. It uses the singular value of audio signal with stable disturbance, inflexible rotation and uniqueness to construct the watermarking. The new way of ellipse curve transformation for the construction of the singular value makes watermarking signal complex enough to avoid being deciphered. In addition, through the two value watermarking image and the image with significance to do the operation as exclusive or, it could satisfy the requirements of authenticating the audio copyright, and implementing data hiding without affecting the imperceptibility of the watermarking. The experimental results show that the watermark is difficult to be discovered and perceptually invisible. The scheme is robust to some audio processing such as a noise added to the audio, shear and resample.